Variable Attentuator/Beamsplitter 10APF units allow mounting a half waveplate and a polorizing beamsplitter. The result is a combined Variable Attenuator/Beamsplitter. To attenuate the beam, you can rotate the waveplate the whole 360°. 10APF3 is a modified 5APH79T mount. When mounted on the M4 hole in the platform, pivot is applied to the base instead of the platform. A beamsplitter is mounted via an adapter to the base. Hence the beamsplitter can be pivoted within ±2.5° in one coordinate. You can freely rotate the adapter in the base and clutch it with a fixing screw.